I am getting set to build an outdoor train layout. One part of the
layout will be roughly 4'X32' and be built like a deck, flat and
level. It will be supported on 24" centers. I am planning on using
3/4" sheets of plywood, and this is where I have my question. I am
thinking about using Pressure Treated 3/4" plywood sheets, my
reasoning is this: it will be subject to moisture, and maintaining
it, after I have installed the track over it will be a chore. I am
looking at a life time of 10-15 years before replacement. After
reading this thread, I am not sure if I am making the correct choice.
I have selected plywood as it will allow me to maintain a flat and
level surface, rather than use structural wood. I would really
appreciate any input from this group, even though it sounds as if this
topic doesn't belong here.
Thank you.